Pay attention when the point D from harmonic pattern comes close to pivot point. Price may (and often happens) does not respect the harmonic / market geometry, and reaches the pivot level. Knowing the location of nearest pivot points (daily, weekly, monthly) may help you in defining possible price behavior at point D. You may want in such cases skip the trade or extend the StopLoss.

Just to reinforce what Kor mentioned previously, in this example we had confirmation of pitchfork as well as channel but price didn't react, some could still enter here and place a stop below the nearest pivot. As you see price bounced off the Weekly S1 right back up to the Monthly pivot.